Density monitor



FIG. 1 is a perspective view showing an ornamental design of a density monitor of a disclosed embodiment;

FIG. 2 is a side elevational view of the ornamental design of the density monitor shown in FIG. 1;

FIG. 3 is a top plan view of the ornamental design of the density monitor shown in FIG. 1;

FIG. 4 is a bottom plan view of the ornamental design of the density monitor shown in FIG. 1;

FIG. 5 is a front elevational view of the ornamental design of the density monitor shown in FIG. 1; and,

FIG. 6 is a rear elevational view of the ornamental design of the density monitor shown in FIG. 1.

The broken line illustrations (e.g., the base, the screws, the front connector, the rear label and parts of the base) in the drawings are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a density monitor, as shown and described. 